TY - RPRT TI - Polycrystalline silicon study: Low-cost silicon refining technology prospects and semiconductor-grade polycrystalline silicon availability through 1988 AU - Costogue, E. N. AU - Ferber, R. AU - Lutwack, R. AU - Lorenz, J. H. AU - Pellin, R. PY - 1984 UR - https://ntrs.nasa.gov/citations/19840025142 ID - 19840025142 ER -